Mitering machine



(No Model.) 2 Sheets-Sheet 1.

W; R. FOX.

MITERING MACHINE.

No. 493,494. Patented Mar. 14, 1893.

(No Model.) 2 Sheets-Sheet 2.

W. R. FOX. MITBRING MACHINE.

N0. 493,494. Patented Mar. 14, 1893.

UNITED STATES PATENT OFFICE. I

\VILLIAM R. FOX, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR TO THE FOX MACHINECOMPANY, OF SAME PLACE.

MlTERlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 493,494, dated March14, 1893.

Application filed February 5, 1892- Serial No, 420,389. (No model.)

To aZZ whom it may concern.-

Be it known that I, WILLIAM R. Fox, a citizen of the United States ofAmerica, residing at Grand Rapids, in the county of Kent and State ofMichigan, have invented certain new and useful Improvements inMitering-IlIachines, of which the following is a specification.

My invention hereinafter described is an improvement in miteringmachines, pertaining especially to the gage and is ofthe kind shown inLetters Patent of the United States granted to me on December4,1888, No.893,970. In gages of this kind the shearing edge or vertical corner ofthe gage is maintained on the line of out while the gage turns, the gagebeing supported against the thrust of the knife by an abutment or postagainst which it bears. The inner end of the gage is held adjustably inplace, ordinarily by a thumb screw Working in a slot. The object of myinvention is to support more effectually the end of the gage next to theknife; further to maintain the knife in a central position relatively tothe ends of the frame and also to prevent springing of the knife.

The invention is shown in the accompanying drawings, in which:

Figure 1 shows aplan view of the invention. Fig. 2 an end elevation.Fig. 3 a detail view. Fig. 4 is a rear view of the machine. Fig. 5 is adetail view on line yy of Fig 4. Figs. 6 and 7 are detail views of theknife.

In the drawings, A represents the bed of the machine along the edge ofwhich the knife moves. At the end of its path is a post 0 having acurved face 19. This curve is struck from the point E as a center on theedge of the bed next to the path of the knife. The gage B is providedwith an enlarged end having a curved vertical face D struck from thecorner or shearing edg'e'ef the gage which coincides with the point Ewhen the gage is in place against the post. The free end of the gage maybe provided with a thumb screw and nut moving in a slot in the ordinarymanner, but it will be apparent that, whether the gage is located atright angles as shown in full lines on the left of Fig. 1 or at an acuteangle as shown at the right of Fig. 1, the

curved part of the gage will bear upon the curved part of the post andhold the gage in position. The gage may have a front curved bearingbelow in the form of a pintle, or a bearing on the frame above as shownat F against which a curved projection on the gage is supported, asshown in my aforesaid patent.

WVhen the machine is at work the knife pressure is directly against thepost and as the gage is held by the front bearing so that it cannotproject over the path of the knife, the tendency of the pressure is tohold it between the front bearing and the curved face of the postregardless of any fasteningat the free end of the gage.

It is desirable in this class of machines to maintain the knife in acentral position relatively to the ends of the machine or to hold thelever in abalanced position so that the carriage will remain in positionas left by the operator, in any part of the stroke. Iemploya weight 10Figs. 2 and 1 which is preferably carried by the operating lever 11 itbeing connected thereto by a beveled tongue and groove 12. The weightextends below the pivot 13 of the driving segment 14 and is heavy enoughto counterbalance the upper end of the lever and prevent the weight ofsaid upper end when moved to one side or the other of its centralposition from moving the knife beyond the frame. After continued use ofthe machine the movement of the parts become so free that the weight ofthe upperend of the lever will force the knife beyond the frame. Thistendency is counteracted by the weight which may be heavyenoughto returnthe knife to its central position should it be moved aside. Wings 30 maybe used on the frame to protect the knives as in my application, SerialNo. 401,058, filed July 29, 1891. In order to prevent springing of theknife under the strain of the'work I furnish a support for the upperportion close to the point 15 which is the first part of the cuttingedge to enter the material to be cut, the edge 16 inclining away fromthis point toward the center of the machine. This support is provided byforming a lug or extension 16 on the knife extending above the point 15,and the upper line 0cac of the cut, the depth of the frame work from z-zbeing preferably increased toaccommodate this lug or extension. Thecarriage is also formed deeper and is provided with an extension 17reaching over the plane of the point 15 and alongside the knifeextension to afford a lateral bearing for the same. The knife extensionis secured to the carriage above and adjacent to the point 15 by a screw18 and a second screw 19 is also used to make the fastening secure andmaintain the cutting edge and particularly the point 15 againstspringing. The knife throughout its body portion is held by screws 19 tothe carriage in the usual manner.

In Fig. 6 the knife on the right of Fig. 4 is shown separately while inFig. 7 and on the left of Fig. 4 a modificationis shown in which the lugor extension is of the full thickness above the point 15, the bevel inthis case extending only to the upper line 00-0 of the cut.

I claim as my invention- 1. In a mitering machine, a gage having acurved bearing face curvedon an arc struck from a point in the line ofits shearing edge, in combination with a post having a COI'I'B? spondingbearing face, substantially as described.

2. In combination the main frame having a guide way, the knife carriageadapted thereto and having outwardly proj ecting knives, said framehaving a portion extending adjacent to guide way and outside of the lineof. projection of theknives edges when the carriage is in normalpositionthe lever for operating the carriage and a weight for holdingthecarriage in normal position withits knives shielded by the frame,substantially as described.

*guide ways, the carriage extending acrossbetween the guides, the knifehaving its body portion secured to the carriage with its cuttingedgeinclined and projecting beyond the carriage and ending in a forwardpoint 15 at the top of the cutting edge the said knife and carriagehaving extensions above. said point secured together, substantially asdescribed.

5. In combination the frame comprisingthe guide-ways, the carriageextending across between the guides, the knife having its body portionsecured to the carriage with its cutting edge inclined, projectingbeyond the carriage and ending ina forward point 15 at the top of thecutting edge, the saidknife having an extension above the point 15 andthe said carriage havingan extension above the said point and reachingforward alongside the knife extension and secured thereto.

In testimony whereof I aflix my signature in presence of two witnesses.

VVILLIAM R. FOX.

Witnesses:

JNO. DUFFY, EARL STOKOE.

